[Extensions] Rework ExtensionUpdater to not be RefCountedThreadSafe
Make ExtensionUpdater pass weak pointers to ExtensionUpdaterFileHandler
and SafeManifestParser.
Fix latent bug where SafeManifestParser would hold a reference to a string
on the stack.
Check all instances of PostTask. Avoid leaking temp files when possible.
BUG=
TEST=
Review URL: http://codereview.chromium.org/6826045
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@81299 0039d316-1c4b-4281-b951-d872f2087c98
5 files changed